The two screws differ from each other in the way that they create the threads. Steel is often used in applications where strength is the primary consideration The steel thread cutting screw has a zinc plating, a Type 23 point style, and a hex washer head with a slotted drive. Thread cutting screws cut the wall of the hole to create the thread, creating material chips that need to be cleared away from the hole to prevent clogging. Trailer Floor Screws Small Parts Steel Self-Drilling Screw, Zinc Plated Finish, Hex 10-24 Screw Hex washer head has a flange for additional grip with the mating surface ZORO SELECT 10083SW Thread Cutting Screw, #10-24 x 1/2 in, Zinc Plated Steel. MPN: 10083SW, SKU: G7599778. This item ships direct from the manufacturer and... The screw, also called a type T thread cutting screw, has fine threads and a type 23 point that tapers down to a blunt edge and directs chips out of the hole to prevent clogging. Thread cutting screw with type 23 point style has fine threads that taper down to a blunt point with a large cutting surface suitable for soft metal, provides excellent chip clearance, and requires minimal rotating force to install Slotted drive has a linear slot for use with a flat-blade driver 10-24 x 1/2 Type 23 Thread Cutting Screws / Slotted / Hex The hex washer head has six flat sides that a wrench can grip to turn from the side, enabling use when there is no space above the head for a screwdriver. Buy Athena's Hamme Log Splitte Wedge Steel Tee Felling Wedges Heat Teated & Tempeed Foged 4140 Steel Long Smooth & Tall Fie Wood Make Exta Long 4 Blade Splitting Wedge with Handle at The zinc plating offers corrosion resistance and has a reflective appearance. Steel is often used in applications where strength is the primary consideration.